- Obituary (1820 Hits)
- Obscurity (2880 Hits)
- Officium Triste (1387 Hits)
- Omission (1268 Hits)
- Omnium Gatherum (171 Hits)
- Onheil (885 Hits)
- Onkel Tom Angelripper (953 Hits)
- Onslaught (1629 Hits)
- Oppressus (1541 Hits)
- Orae (1395 Hits)
- Orden Ogan (1432 Hits)
- Out For Blood (945 Hits)
- Outrage (JPN) (475 Hits)
- Overkill (1307 Hits)
- Ozzy Osbourne (1467 Hits)